Peter Mettler
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Otp Wordlist — 6 Digit

Understanding 6-Digit OTP Wordlists: Generation, Risks, and Security

2. Recovery Code Brute-Forcing

Some services provide 6-digit backup codes (static OTPs) to use when you lose your phone. These codes do not expire. Attackers love this. They obtain a list of hashed backup codes from a breached database and then run a 6-digit wordlist against the hashes to crack them offline. Since 654321 is just as easy to hash as a random number, the wordlist makes cracking trivial.

The Hidden Danger of "6 Digit OTP Wordlist": Why It Exists and Why You Should Never Use One

Security Considerations

  • Storage and Distribution: OTPs must be stored and distributed securely to prevent unauthorized access. Users should be cautious about sharing their OTPs with anyone.
  • Expiration and Usage: OTPs should expire after a certain period (e.g., 30 seconds) and can only be used once to enhance security.